Filter.



H. RABENSTEIN.

FILTER. `APPLIOATION FILED FEB. 28, 1912.

Patena Feb. 11, 19131 l fi HEINRICH. BABENSTEH, @E E'ANJEIEEL; GERMANY FILTER.

Specification of Leiters Etaient.

Paisenieal Een., il', llilz Application filed Ferusry 2B, 1912, Seal o. SSGQQ.

suoli as beer, .incl is more especially an inv 11u-overnam in shot type. of i'esflilylsepeia'ble und cleensible fier wlz'icli'is composee of s },-l'.11'aliy of sections or individuel. ii eer eief` ments compresse eogethe in e siiislile frame and leuning when time svssemble. s continuous filter' drum with. the lter mess und suitable longiludinsl liquid 'iniciI and. outlet conduiis coma-ined sliereiii. in lisis of this dismessi' the lite? elements e'e comi-.poseii each of a shell wail and a. bottoni or septum well, and esclu forms s chamber for liefecepion ci' iiliei' mess. The septum' wells pesf'oi-fm yille functions of Clisisiibiiizing the i'z-u'i'bid liquid. i@ end coliec'iing the clear.

liquicl from alie ileel'fakes 'fiopp@ siie sicles tiieeoiz; 4@mi io this'end they are provided in their surfaces with a. suitable numbei' of channels suisiloly close together for conducting the liquid *so oi' fiom large Dari of lie areas of the suis-ces o the liitsr imi-ss. "in esirsble fome of lter plate oi' well these channels sie formed by parallel ribs oi! such pioxiniiy (approximately less than :i length from crest i0 cessi) that she filter mass cennob peek. ino the interg Vening valleys. vwhich ccnsiituie open or substanially open channels for lie purposes distribution und collection :is above lesciibefl. Fort of the rilier pluies or umili@ ci" the channels diei-cof, are in communicazion wiili die longitudinal liquid inlet conduit. or conduits, While 'the remainder of he Walls with their chan'e'ls are in communica.- tion with the liquid outlc conduit oi conduits. lt is desimlileto uii'smge the Walls Willi lie inlet-connuunicuting; o1 distributing walls alternating with the ouiiletcom- Inunicuting oi collecting walls. The chum 'nels iiuvewsing; the sui-'fnac oi' die walls :me suitably placed in mnxi'mnifutimi with their respective longiiucliiml conduits by means @if their cfmnls encircling the ribbed portions :ind suiiu'nle peiforuiions umile in the shell. well.

The oli'iec of is invoiision is io procure s u nifoi'u'i disfiibution 'the unfiltered '-iiquiii io fue fili-ei' fi s ui'iifoin'i esrying-oil' of the Siiferel liquid therefrom;

and the invention-maj? ce and preferably is applied to e, lter elementvand lter of the kind described. To this end, the channels traversing the septum-Walls are not of imi oim cisnes-section throughout ilieii lengalis7 noi' ae ilie 'iios of uniform heiglii; i-lxiougliout theii' or the maior perdons thereof is heretofore, but the crosseection oi each channel srs-ries throughout its iengibli in eccoidsnce iifilifiolie ow olf liquid fuere liirough, preferably by forming she ribs of height mig means com mnnieetion ceween elle channels and tile iiiie; oi outlet conduit smi of least legiit se iii@ poinfss ifemoe therefrom, the ribs grail usliy eiecieesfmg ox' incieesing in height he sweeii `diese ex'sremes, according; as they be egmcleel. extending from the inlet provisions oi inward the outlet pyovisions, ln alle esse o3i` parallel ribs and channels terminating ai their ends in an encircling canal, constituing s. connection between the channels and lie inlet oi outlet concluii'. the chalinels inci'eese in cross-section g'isduaily from their censors to 'tneir ends, this seing effected preei'ably by increasing die height of the ribs gradually fiom their centers to their ends.

Having thus crieiy described the nature of the invention, reference iviil be had to the annexed drawings wherein an illustrative embodiment of the improvement is shown.

in the said drawings, Figure l is a face View of u i'il'ter element; Fig. 2 is a section, ilrrougli two elements of the drum on ille line 2 2 of Fig. l. Fig. 3 is zi fragmentary sei-,tion on the line 5%3 of Fig. l. Fig. i is a similar section on the line 4-4 of Fig. l.. The iier elemeni illustrated comprises s shell oi1 casing section l and zi septum-piste oi* wall 27 which is permanently secured tliei'oo in any suitable manner. The elemenig is pyovizleci ai. iis sides with hooks or enf-s 3 luy means ci' which it is supported on rods oi' the iframe (noiy shown.) in the usual nmnnei'. with suitable bundles el. The iitei flrum is provided with migiiufiiunl inlet und outlet cmiduii's which :ire preferably :formeel in fixe vxieusions 5 of the shell i, :it ion sind bulloni Hier-cof, mieli Vir-imi Wiili wmsi'itum ille iilei emfiens ui ce, 11o 'iiicfi li ni. The in acier esc-ii i cornmnnieaizion vii-li only two of it:

lil@

The top und bottoni is provided I tions of the filter cake.

portion as the curda/fla; streams approach the intermediate connection 13 to the outletconduit and are progressively augmented by the liquid emerging from the various por- The septum wall may be made ^of hard rubber or metal covered with 'rubber so as to be neutral to the liquid in contact therewith.\ The shell ivall 4may be metal with rabbet joint-matching ends,'betWeen which the outer portion of the filter-mass is compressed to render the same impervious at this region.`

The invention is also of advantage in connectio'n Witli the cleansing of the filters by flushing the-`with Water in the reverse directien to' the, flow of the liquid to be filtered. In filter plates having channels of the same cross-section throughout, the sediment or slimyndregs is apt to become packed l so as to prevent successful back Washing.

This is not the .case withV my filter plate wherein the area of the channels between the'ribs increases in the direction of the flow ofthe WashWater.

What I claim as new.is: l. A filter plate having a parallel ribbed surface affording conductingehannels, the

ribs thereof being of increasing height from the center to the rim whereby the intervening channels correspondingly increase in depth.

A2. A filter element constituting a section f a sectional drum filter, said element con1- prising a shell wall having sections of longitudinal inlet and. outlet conduits therein and a ribbed septum-Wall ailordiug channels eommunicating With-one kinder lconduit, said ribs varying in height gradually ljhrom maximum at the portions of the chan-` jnels which communicate with the conduits tc ruin'lmznny at the regions reinste there from. u x

3. A' sectional lilter press comprising a plurality of filter plates having surfaces f provided with parallel ribs affording narrow distributing and collecting channels7 the 'distributing channelsy decreasing in cross-section"gradually from their inletoends and the collecting channels` increasing in cross-section gradually. toward their exit ends.

4. A `sectional lter press comprising a plurality 'of filter plates, their surfaces prounequal lengt-h exten-ding'across it-s surface.

and forming conducting channels, the said ribs increasing in height gradually from their centers to4 their ends so as to afford conducting channels the cross-sections of i'vhichvary in like manner, the cross-sections of the ends of the Various channels also varying in accordance with their lengths.

.In testimenyfwhereof, I have signedl this specification in the presence of two Witnesses..

HEINRICH RABENSTEllfl Witnesses:

- A.. 0. TITTMAN S H. SHANK. 

